The baby name Leonore appears in baby name data for the United States from 1911 to 1957. It was most popular in 1928 with 96 babies given the name.
In the later years of this period, Leonore has become less common than it once was.
| Year | Count |
|---|---|
| 1911 | 11 |
| 1912 | 9 |
| 1913 | 19 |
| 1914 | 21 |
| 1915 | 13 |
| 1916 | 50 |
| 1917 | 36 |
| 1918 | 27 |
| 1919 | 39 |
| 1920 | 19 |
| 1921 | 23 |
| 1922 | 63 |
| 1923 | 56 |
| 1924 | 82 |
| 1925 | 63 |
| 1926 | 73 |
| 1927 | 57 |
| 1928 | 96 |
| 1929 | 41 |
| 1930 | 28 |
| 1931 | 20 |
| 1932 | 23 |
| 1933 | 16 |
| 1934 | 19 |
| 1935 | 10 |
| 1936 | 12 |
| 1937 | 9 |
| 1938 | 5 |
| 1939 | 8 |
| 1940 | 5 |
| 1941 | 14 |
| 1942 | 21 |
| 1943 | 13 |
| 1944 | 16 |
| 1946 | 9 |
| 1949 | 6 |
| 1952 | 6 |
| 1954 | 5 |
| 1956 | 5 |
| 1957 | 10 |